METHOD FOR OBTAINING SUSPENSION CONTAINING PHOSPHATE Russian patent published in 2008 - IPC C05G3/00 C05B7/00 

FIELD: chemistry.

SUBSTANCE: invention relates to method for obtaining suspension containing phosphate, from phosphoric acid, base and organic additives. Phosphoric acid is preliminary neutralised with base; organic substances, such as emulsifiable oil and sugar, are added; process of formation of crystallisation centres and crystallisation during cooling are controlled. As base, mixture of potassium hydroxide and sodium hydroxide are used in molar ratio KOH/NaOH = 0,5 - 1,2, phosphoric acid of quality for fertiliser with concentration of P₂O₅ of 54 - 62%,, from 1.5 to 8% of emulsified oil and from 1.5 to 10% of sugar are used. Neutralisation is carried out to pH 3-3.5 at temperature within the range from 40 to 65°C. Phosphate suspension according to the invention, is used for coating seeds. The method allows for preserving constant ratio of fixing agent and nutritional components in the process of seed coating, which simplifies the process.

EFFECT: possibility to preserve constant ratio of fixing agent and nutritional components in the process of seed coating in order to simplify the process.

17 cl, 6 tbl, 6 ex